Time has past, since the last comment in this threat, but perhaps someone is still interested in finding a cheap working wifi-connection for the D4, that doens't need an internet connection.

Well, I have an easy-working one I paid about 50$ for. It looks complicate in the beginning, but once you've set it up, it works very stable and easily.

I use an asus WL-330N N150 WLAN AP, REPEATER,GATEWAY,BRIDGE (about 40$, it's tiny and looks professional and has an easy selfexplaining setup-programm) and an external battery (to power up the modem). I configured the WL-330N as an access point.

Configure the camera D4:
In the D4 go to network menue, choose hardware, wired lan (go back), enalbe network connection, go to network settings, Create a profile, connection wizzard, choose Camera control if you want to use the software camera control Pro 2, name it, after that select "enter manually" to choose how the IP address ist optained. (you can choose for example 192.168.101.101). The subnet mask you don't have to change.

Now the pairing starts:
Connect the camera to the pc using the USB cable, then start the wireless transmitter utility. The software configures the IP-Address for the camera. You are almost done.

Connect the ethernet-cable from the camera to the asus-WL330N. Give the system a minute.

Go to the pc:
No go to thewireless-network of your computer an choose connect to the asus access point. Now its getting interesting. On windows-pc go to control Panel > Network and internet > Manage network connections. Select internet protocol version 4 (TCP/IPv4) choose properties > choose optain an IP adress manually and set the IP-number according to my example to 192.168.101.102. (it must be a number nearby the one from the camera IP-address).

Now we can start the connection:

Go back to the camera: network, network settings, the camera starts to connect, if it takes to long reconnect the wifi conection pc to asus. Now everything should be fine.

Next time you want to connect the camera to the pc you just have to do the last two steps. Enable Network connection on the camera. Start the wifi-connection pc to asus and don't forget to optain an IP number manually in the internet protocol version 4 (TCP/IPv4)properties. You can control the camera wireless without an internet connection.

@SkintBrit I think I agree... but there may be someone who finds a less expensive solution. Like Vello or one of the other folks who make the NIKON knock offs. I put up the thread hoping to find a solution less than the $900. Of course, I really think some of us will pay for the name.... guilty am I!

Whilst it does look like Nikon is charging WAY too much for the WT-5, unfortunately none of the other solutions give the same flexibility at anything like the same size & convenience as their device. Seems to me it's another situation of "you pays your money, and you takes your choice". Although I'd hate doing it, I'd still buy one if I had a D4.

Since the announcement on NR of the VAP11G portable WiFi bridge device which can be used to provide connectivity between one's iPad, iPhone, etc., with one's D4, and do this for about $30, there certainly seems to be room for others ideas as to how to not spend nearly $900 for the NIKON WT-5. And where does the Asus WL-330gE wireless access point fit into the picture. SO, the point of this thread is to get the experience of those who have actually put together the pieces and made it work. Let's get the ball rolling. I do not want to spend another $900 right now on the WT-5 as I want an iPad, the new one to go with the D4.